Of making the same



(No Model.) 7 0,0. ANDREWS.

SHEET METAL RING AND METHOD OF MAKING THE SAME;

Patented Feb. 8, 1887.

g ww UNITED STATES PATENT OFFICE.

CLAYTON C. ANDREWS, OF WATERBURY, CONNECTICUT, ASSIGNOR TO THE AMERICANRING COMPANY, OF SAME PLACE.

SHEET-METAL RING AND METHOD OF MAKING THE SAME.

SPECIFICATION forming part of Letters Patent No. 357,302, dated February8, 1887.

I Application filed November 15, 1886. Serial No. 2l8,967-. (No model)To aZZ whom} it may concern:

Be it known that I, CLAYTON C. ANDREWS, of Waterbury, in the county ofNew Haven and State of Connecticut, have invented an Improvement inSheet-Metal Rings, of which the following is a specification.

Figuresl and 2 are partial sections in larger size of well-known formsof rings. Figs. 3 and 4 are partial sections showing my improvements,also in larger size; and Fig. 5 isa section of my improved ring.

Hollow rings for cornices, &c., have been made out of aring-shaped blankof sheet metal drawn up in dies, so that the metal of the inner part ofthe ring comes inside the metal of the outer part of the ring, as seensectionally in larger size in Fig. 1; but in this case the outer edge ofthe fiat sheet-metal blank, being of greater length than the same edgeof the sheet metal alter it has been stamped up into the form of thehollow ring, such edge (2) is liable to be corrugated and thickened, andthe ring does not have a finished appearance, and it is liable to berough and to scratch the cornice-pole. In some instances the edges ofthe sheet metal have been brought together as shown in Fig; 2 but thereis nothing to strengthen the metal at the joint, and it is liable tobecome dented and injured in use.

My invention is for strengthening the sheet metal of the ring atthejoint and rendering the inside smooth, and at the same timefacilitating the construction.

The sheet-metal blank is cut out in the form of' a ring and stamped upin dies, as usual, until it assumes the form of a hollow blank or shell.(Shown sectionally in large size in Fig. 3.) At this stage it may beannealed, if necessary, and cleaned byacid. The edge 3 is then rolledover inwardly by a suitable die, so as to form a bead, 4, having asemicircular or greater sectional contour, as seen in Fig.

4. This rib is made of the portion of the sheet metal that is slightlythickened in pressing up from the fiatblank; hence this bead is thestrongest part of the ring. The inner edge 5, of the sheet-metal blankis outside this rib 4, and it is closed firmly against such rib, andthereby bent. outwardly, so that the inner part of the ring that comesinto contact with the cornice-pole is convex sectionally and smooth, andthe pole does not become scratched. Besides this, the pressure can besufficiently hard to impact the metallic surfaces together and renderthem water-tight, or nearly so, and the acid or liquid will not passinto the hollow ring in any subsequent dipping, plating, or coloringoperation, and the ring is smooth and much stronger than the ringsheretofore made.

I claim as 1ny,invention 1. The method herein specified of making hollowsheet-metal cornice or other rings, consisting in cutting out thering-shaped blank, pressing the same up into a hollow blank or shell ofa. U-shaped section, and then rolling the outer edge of the sheet-metalinwardly and downwardly to form a rib within the inner edge of the sheetmetal, and then pressing such inner edge outwardly against the rib,substantially as set forth.

2. The hollow sheetmetal ring having the inwardly-turned rib 4 Withinthe inner edge of the sheet metal, the latter being bent out Wardlyagainst the rib, substantially as set forth.

Signed by me this 10th day of November,A.

CLAYTON C. ANDREWS.

' Witnesses:

DAVID N. PLUME, WALTER H. CooKE.

